题目内容
计算,能用简便算法的用简便算法
(5.6-2.4)×(1.45+2.55)=
[ ]
12-8-2=
用简便方法计算.
12.5×2.5×0.8×4=
A.1
B.14
C.100
D.370
12
[
A
B
C
D